Evaluation of U.S. National Lightning Detection Network performance characteristics using rocket-triggered lightning data acquired in 2004-2009
Evaluation of U.S. National Lightning Detection Network performance characteristics using rocket-triggered lightning data acquired in 2004-2009
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DOI：
10.1029/2010jd014929
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发表时间：
2011-01
影响因子：
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通讯作者：
A. Nag;S. Mallick;V. Rakov;J. Howard;C. Biagi;J. D. Hill;M. Uman;D. Jordan;K. Rambo;J. Je
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文献类型：
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作者：
A. Nag;S. Mallick;V. Rakov;J. Howard;C. Biagi;J. D. Hill;M. Uman;D. Jordan;K. Rambo;J. Je
[1]我们评估了美国国家闪电探测网络（NLDN）的性能特征，使用2004-2009年在佛罗里达布兰丁营获得的火箭触发闪电数据。在这些年中，总共触发了37次包含前导/回击序列的负闪光（总共139次）。对于所有的回击，都准确地知道了地面上通道终端的位置，其中122个通道的电流是直接使用无感分流器测量的。NLDN在34次闪光中记录了105次布兰丁营地中风。由此产生的闪光和中风检测效率分别为92%和76%。绝对定位误差中位数为308 m。NLDN估计的峰值电流误差的中位数为-6.1%，而电流估计误差的绝对值中位数为13%。在“经典”触发闪电中风是类似于定期后续中风（以下先前形成的渠道）在自然闪电，因此，这里提出的结果是只适用于定期的负后续中风在自然闪电。这里报告的闪光检测效率预计会低估自然负闪电的真实值，因为第一次雷击通常具有比随后的更大的峰值电流。
[1] We evaluated performance characteristics of the U.S. National Lightning Detection Network (NLDN) using rocket-triggered lightning data acquired in 2004-2009 at Camp Blanding, Florida. A total of 37 negative flashes that contained leader/return stroke sequences (a total of 139) were triggered during these years. For all the return strokes, locations of channel terminations on the ground were known exactly, and for 122 of them currents were measured directly using noninductive shunts. The NLDN recorded 105 Camp Blanding strokes in 34 flashes. The resultant flash and stroke detection efficiencies were 92% and 76%, respectively. The median absolute location error was 308 m. The median NLDN-estimated peak current error was -6.1%, while the median absolute value of current estimation error was 13%. Strokes in "classical" triggered flashes are similar to regular subsequent strokes (following previously formed channels) in natural lightning, and hence the results presented here are applicable only to regular negative subsequent strokes in natural lightning. The flash detection efficiency reported here is expected to be an underestimate of the true value for natural negative lightning flashes, since first strokes typically have larger peak currents than subsequent ones.